L2 Network Engineer

L2 Network Engineer Interview Questions and Answers for Freshers

Updated 2 Jul 2025

Asked in NTT Data

6d ago

Q. What is the use of routing, and what are its applications?

Ans.

Routing is the process of selecting the best path for network traffic to reach its destination.

Routing helps in directing network traffic efficiently
It determines the best path for data packets to travel from source to destination
Routing protocols like OSPF, BGP, and EIGRP are used to exchange routing information
Routing tables are used to store information about network paths
Dynamic routing adjusts to network changes automatically

Asked in NTT Data

5d ago

Q. Define firewall generations and their roles.

Ans.

Firewall generations refer to the evolution of firewall technology and their roles in network security.

First generation firewalls - packet filtering based on IP addresses and ports
Second generation firewalls - stateful inspection and improved security features
Third generation firewalls - application layer filtering and deep packet inspection
Fourth generation firewalls - next-generation firewalls with advanced threat protection capabilities
Each generation builds upon the previ...read more

Asked in NTT Data

4d ago

Q. What is IPS? How does it work?

Ans.

IPS stands for Intrusion Prevention System. It is a network security technology that monitors network traffic to detect and prevent malicious activities.

IPS is a network security technology that monitors network traffic in real-time.
It can detect and prevent malicious activities such as hacking attempts, malware infections, and denial-of-service attacks.
IPS works by analyzing network packets, comparing them to a database of known threats, and taking action to block or allow t...read more

Asked in NTT Data

6d ago

Q. At what layer does a firewall operate?

Ans.

Firewall works at the network layer.

Firewall operates at the network layer of the OSI model.
It filters and controls incoming and outgoing network traffic based on predetermined security rules.
Examples of firewalls include hardware firewalls, software firewalls, and cloud-based firewalls.

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Asked in Infosys

4d ago

Q. What is IP Spoofing?

Ans.

IP Spoofing is a technique where an attacker impersonates another device by falsifying IP address in order to gain unauthorized access.

IP Spoofing involves manipulating the source IP address in a packet to deceive the recipient.
It is commonly used in DDoS attacks to hide the true source of the attack traffic.
Prevention methods include implementing ingress and egress filtering on network devices.
Examples of tools used for IP Spoofing include hping and Scapy.

Asked in Aksentt Tech Services

1d ago

Q. Types of firewall

Ans.

Firewalls are security devices that monitor and control incoming and outgoing network traffic based on predetermined security rules.

Packet Filtering Firewall: Inspects packets and allows or blocks them based on IP addresses, ports, and protocols. Example: Cisco ASA.
Stateful Inspection Firewall: Tracks the state of active connections and makes decisions based on the context of the traffic. Example: Check Point.
Proxy Firewall: Acts as an intermediary between users and the inter...read more